Improvement in fan attachments for sewing-machines



M 6 h S u 5 M 6 h S 2 N 0 S P M 0 H T E G R O E G lmpr ovement in Fan Attachment for S ewing-Machines.

Patented May 23, 1871- Witnasses.

GEORGE THOMPSON. lmprovementwin F an kttachmen t for sewing Machines. NO. 115,255; I P'atnt ed May 23,1871.

Witnesses. Invemw- 2 Sheets--Sheet 2 dnitcdgtatw Letters Patent No; 115,255, dated May23, 1871.

TIMPROVEMENTYIN FAN-ATTACHMENTS FoR SEWING-MACHINES.

The Schedule referred to in these Letters Patent and making paste! the name.

I 1Tb .all whom it may canoe-r125 Beit known that I, GEORGE THOMPSON, of Springfield, in the county oi Sangamon and in the State of Illinois, have inventedcertain new and useful Improvements in Automatic Fans for Attachment to and Operation by Sewing-Machines; and do hereby declare that the following isfa full, clear, and exact description thereof, reference being bad to the accompanying drawing making apart of this specification, in which- Figure 1 is a rear elevation of a sewing-machine containing my improved fan attachment,

I Figure 2 is a like viewof said machine, showing the flan-driven directly without the intervention of gearing;

Figure? isa side elevation of fig. 1; and Figure. 4, a like view of fig, 2.

y Letters of likena ine and kind refer to like parts in each of the figures. I I I I I The'object of my invention is to add to the comfort ofa sewing-machineoperator in hot weather by means of a current of air thrown upon the head, which air is, set in motion by a fan actuated by suitable mechanism connected with and driven by the machine; and

It consistsin, theconstruction and combination of thevarious parts of the operating mechanism, substantially as and for thepurpose hereinafter shown.

In the annexed draWing- A represents the table of a sewing-machine resting upon and secured to metal supporting-frames, B, the lower ends of which are connected together by means Projecting horizontally outward from the right-hand I of a round bar,-0.

I fr ameis a short shalt, D, upon which is pivoted a balaiiceand driving-wheel E, provided upon 'one of its arms, 0, with a crank-pin, f, having pivoted thereonone end of a connectiomh, the opposite end of which.

is pivoted to orupon the rear end of a treadle, G, that in turn is pivoted uponthe cross-bar O, the whole beiug so arranged as that a reciprocating rocking motion imparted to said treadle by the feet of the operator will cause a rotary movement of said driving-wheel in the usual manner.

Secured to and projecting vertically upward from the table A, toxtheright of the operating mechanism, is a hollow standard,'H, containing a rod,-I, the upper end of which extendsoutward and downward in a curve,

, and is provided on its outer end with a short horizontal journalfli. I I The vertical position of the rod is secured by means of a set-screw, K, which passes horizontally through the upper end of said standard and bears against said rod. I

while to its rear end is pivoted one end of a'connectdug-rod, N, the opposite end ofwhich is connected with thefront end of a lever, 0, which in turn is pivoted, at or near its longitudinal cent-er, upon a stud, 1), that extends horizontally outward from the lower end of a brace, P, secured to and projecting downward from the bed A.

A secondconnecting-rod, Q, pivoted to the rear end of the lever O and to the rear end of the treadle G,

completesthis portion of the mechanism, and caiises a corresponding vertical movement oflthe fan whenever said treadle is moved, so as thereby to create it our rent of air directly over or'upon the head of the opera.

ator. I 1

In order that the'fan may be driven more rapidly, when desired, the following-describedadditional gear ing is employed, the rod Q being first disconnected from the lever O.

A two-armed lever or frame, R, having a general A-shape, is pivoted near the longitudinal center of one of its arms to or .upon'the supporting-frame, so as to cause the opposite arm to extend downward and slightly rearward.

To the upper or central portion of the lever is pivoted a pinion, S, having attached to its outer face a crank, s, while to the lower rear end of said lever is pivoted a sleeve, T, provided with two radially-projecting arms, 17 and t, the latter of which is connected, bymeans of a rod, U, with the rear end of the lever 0, while the-arm t is in a like manner ponnected with the crank s byiueansofia rod, V.

A,gear-wheel,"W, secured to and moving with the drivingswheel, and meshing with the pinion S, imparts motion to the latter, which motion is communicated wheel.

The lever B is held in position by means of a screw, 0', which passes horizontally through the end of its forward arm into the supporting-frame; and in order to throw the pinion out of gear it is only necessary that said screw be removed so as to permit the rear end of said lever to drop slightly downward, after which said I screwinay be again passed through the arm of said lever, and inserted in a second corresponding threaded opening within the frame.

As the height of the fan above the table requires to be varied to suit the height or convenience of the oporator, the rod N is constructed of two sections, the lower half-n being hollow, so as to permit the lower end of the upper section a to pass within. I

A set-screw, 'n, passing through the wall of the lower section and hearing against the upper section, enables them to be locked in position when adjusted.

The advantages possessed by this device are that, while comparatively inexpensive and requiring but littlepower, they add largely to the comfort of the operator.

Having thus fully set forth the nature and meritsof my invention,

What I claim as new is'-- 1. In combination with the treadle G and supporting-rod I, the pivoted levers L and 0, the fan M, and the" connecting-rods N and Q, substantially as and for the purpose specified.

2. In combination withiiib driving-wheel E and supporting-rod I, the gear-wheel W, the pivoted levers It and O, the pivoted sleeve '1 provided with the arms t and t, the connecting-rods U and V, and the pinion and for the purpose described.

In testimony that I claim the foregoing I have hereunto set my hand this 8th day of April, 187].

GEORGE THOMPSON.

Witnesses:

S. M. OULLOM, Geo. S. THOMPSON.

S provided with the crank s, substantially as shown, 

